Hi Charlie,
What version of Patch Data do you have?
I have checked that these KBs are actually included to Patch Data 7.1.396.
Please navigate to Patch Remediation Center, select Show All Software Updates and search the following bulletins:

Kb2264107 -- A new CWDIllegalInDllSearch registry entry is available to control the DLL search path algorithm

Kb2264107 is included to bulletin MSWU-435

Kb2565057 -- Ms11-025 -- Description of the security update for Visual Studio 2010 Service Pack 1: August 9, 2011 – does not have a patch. Manually.

I am wonderfing if anyone tried to import old MS bulletins before. I'm trying to find a way to import MS11-025. For the old MS bulletins, if I could find it in PMImport, but not downloaded, then I could easily select to download it, but in this scenario, I could not find MS11-025.

I could download it form Microsoft site, but how we could incorporate it into Altiris for the auto push deployment?

Could you please provide screenshot where MS11-025 cannot be found in NS Console?
I managed to download MS11-025 from Patch Remediation Center with imported Patch Data 7.1.400.
Please see attached screenshot.

Both of our Lab and Production Altiris NS do not have MS11-025. I guess it was because I chose 70 products specific to servers only, out of 525 products from Microsoft in PMImport. Or maybe other unknown missing.

I tried to find if Symantec could incorporate old bulletins/KB into specific Patch Data, but found it to no avail.

I guess you are right. Most likely MS11-025 has not been imported on your Notification Servers because product associated with this bulletin has been excluded in PM import settings.
Please check that all versions of Microsoft Visual Studio 2010 are selected in the list of Vendors and Software(please see attached screenshot). In case if they are not selected, select them and updates related to these products(including Kb2565057 from MS11-025) will be imported during next PM import run.

Regarding version of Patch Data, it should be shown in Import Patch Data task details - Navigate to Import Patch Data for Windows page and double click on last instance of Import Patch Data task. Version of imported data will be shown (please see attached screenshot)
Also you can check it from Manifest.xml located under Altiris installation directory(../Altiris/Patch Management/Downloads/Manifext.xml). Manifest version equals to version of imported Patch Data.